Door-closing mechanism.



0. C. RIXSON.

DOOR CLOSING MCHANISM.

APPLICATION FILED 113.3, 1909.

1,025,309, Patelltd May 7, 1912.

3 SHBETSWSHEET 1,

:"g 2 5'@ lzfgf 0. C. RIXSON.

DOOR CLOSING MEGHANISM.

APPLICATION FILED FEBJ, 1909. 1,025 ,309. Patented May 7, 1912.

3 SHEETS-SHEET 2.

'PATENT OFFICE.

oscar. c. mxsoN, or NEW YORK, N. Y.

DOOR-CLOSING MECANISM'.

Specication ot Letters Patent.

Patented May 7, 1912.

Application led February 3, 1909. Serial No. 475,885

To all whom it may concern: l

Be it known thatI, OSCAR C. RixsoN, citizen of the United States, residing at New York, in the county of New York and State of NewYork,-have invented a certain new and useful Improvement in Door-Closing Mechanism, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings,for1ning a part of this specification.

, h invention relates to means for closing -a door, and is especiallyjadapted to a double-actmg door mounted to be swung open in either direction from the normal close position;

Among the objects of the invention are to cause thedoor` to be closed positively, yet without banging; to hold the door normally closed, as against wind pressure or the like;

to rovide ad ustments for the door-closing an A door-checking devices, so that the same may be. independentl regulated for varying conditions; to rovicie such Vleverage in connectionvwith t e mechanism that the door- .the door, and in ooperation therewit means (such as liquid checking-mechanism? for 'retarding the closing-movement wit i certaint to prevent the slamming and bangin oft edoor.

urthermore, as applied to double-actin doors, the invention' comprises additiona closing-means (a second spring) and addi- `tional retarding-means (a second checkingy Amechanism) co-acting' together tooperate .upon ,the 'opening and closing of the doorA on the; other side of the doorway.

' The invention vfurther comprises certain subsidiary devices, valves; byasses, levers, 1i'nks;`etc., wherebywhen the oor is opened and-closed upon one side of' the doorway, one set-of devices (sprin ',andfcheck) Vis op".

verative for closing'the oor and 'retarding and checking its swing, while the other set (sprin and check) is rendered noninter'fer- .l en -an y l hefnvention further comprises `certain l provisions of leverage, whereby the door is held closed with maximum effect, yet may be opened with diminishingeiort.

The invention further comprises means for re lating the various door-closing and door-c eckin mechanisms, and especially for indepen ently regulating any one or more of the said four mechanisms.

Theinvention consists of each and all of the foregoin features and combinations, and of certaln details of construction and arrangement hereinafter set forth and claimed.

The invention will be best understood by' referring to the annexed drawings which show a preferred embodiment thereof as ap lied to a double-actin door (though it be applied to a single-acting-door).

In these drawings, Figure 1 is an elevation, broken away throu h the center, and art] in section at the i ottom, showing a oub e-acting door mounted in its bearings and in its normal closed osition; this figure is Aon a smaller scalet an the remaining view s; Fig. 2 is a horizontal section through line H of Fig. 1, the door being in closed position; Fig. 3,' is'a vertical section'through ine b-Lb of Fig; 2; Fig. 4 is a plan or top view of the casing shown in Fig. 1,- the door andpart of its hinge-plate being removed; Fig. "5 is a horizontal section on line c-c of Fi .3,being located below thesect-ion shown 1n` `g. 2, t e parts having the position they occupy when the door is closed; Fi 6 isa artlal view similar; to' Fig. 5, the oor belng indicatedin one of itstwo open positions; Fig. 7is anvenla'rged detail of one of the pistons, showing a4ball valve; Fi 8 is a view.sim11an' to F1g. 2, except the oor is shown in 'one'of -its opened positions; Fig. 9 'is' a transverse 'vertical Section through line Fig. 10. isa vertical'section-through line e-e ofl Fig. 4,-'shwlii1gipneof the springs and nstitutes oneof-.the dooriv- 2 is; a. .top vview o f the s aft wil be understood that t e invention may.

'adjacent Paris flv'rlfadjlustiug its tension; Fig.'11 i'aidetail elevation, of the main indicated as in its closed or normal position. To the bottom edge of the door is secured the slotted plate 4, which latter engages the correspondingly-shaped upper end of shaft 3 (Fig. 4), thus locking the door and shaft 3 together so that the turning of either on its axis carries the other with it. The operating-devices are inclosed in casing 5, which is located in the sill G beneath the door-- and provided with a cover 7 that lies flush with the sill. These operating-devices are connected to shaft 3, which thus becomes the operating-shaft, transmitting movement from the door to the mechanism and vice versa. This shaft 3 is located near one end of casin 5, its lower end turning on the ball-bearing 10 (Fig. 3), while its upper bearing is in the collar 8 which is threaded into the top wall of the casing. In the present instance the,` operating-shaft 3 extends upward from casing 5 which is located beneatli the door; but the casing might be inverted and located in the upper lintel, above the door.

)Vithin the casing and adjacent the shaft 3 are the two horizontally-extending cylinders 34 and 35, of the liquid checking mechanisin or check, with their pistons 36 and 37; and beyond them the vertically-arranged helical spring 11 and the oppositely-wound helical spring 12 (Figs. 5 and 2).

The four parts are suitably connected to the operating-shaft 3 so that one spring and one check are calledA into play and co-act, positively and without fail upon the open- -ing and closing of the door at' oneside of the doorway, Without interference from the other spring and check; and, vice versa, they do notV interfere when the door is opening and closing upon the other side of the door- Vway, the other` spring and check co-acting .is seated in an opening in cover 7 and .lies

flush there-with, and is r0vided with segmental seats 26 for loc ing it in various positions of adjustment by means of screws 27- that take into cover 7 (Fig. 4), wherebyv shaft 22 is held against rotation. Upon the tower end of each shaft is keyed, by pin 33,

the disk or fixed anchor 32,- to which the lower end of the spring is made fast. Upon this same shaft 22 is mounted a freelytiirning sleeve carrying at its upper end the disk l or movable anchor 14, to which is secured' the upper end of spring. From each one of these upper anchor plates 14 there extends to the operating shaft 3 an independent connection, comprising preferably a plurality of links whose remotest member (13 and 19 respectively) is comparatively short aiid is pivoted to crank-ears 17-17 upon shaft 3. Axial turningl of shaft 3 in one direction winds up one spring, and turning of the shaft in the other direction winds up the other spring. Depending from the cover 7 is a lug or stop 142 adjacent the rear of the first link 15 of one spring (Figs. 2 and 3) while a similar stop 143 is provided for the first link 20 of t-he other spring.

Preferably the sides and rear of shaft 3, at the level of Short links 13--19 (as seen in Figs. 2, 8 and 11), provide a camfsurface that affords maximum leverage for the tension or pull of each of the two springs when the door is closed (Fig. 2), while the stops 142 and 143 limit the extent of pull' of each spring; whereas, in the opened position of the door (Fig. 8,) the minimum levcr age is afforded the tension or pull of the then-operating (lefthand) spring 11, while the collapsing or folding of the links 1t) and 21 and the presence of stop 143 render the other (right-hand) spring 12 inactive. But such cam-surface of the shaft 3 may be dispensed with, and the outer links (13 and 19) connected to shaft 3 at one side of the dead center, in which case the ordinary effect of the rotation of shaft 3, in moving the pivot of link 13 (or 19) throughthe quadrant, may be relied on for lessenlng the leverage of the springs.

lIn the normal closed position each spring tends to draw its links toward it (to the right in Fig. 2), while the shoulders 142v and 148 prevent either spring from preponderating over thev other and forcing thevdoor past its normalclosed position. In practice, particularly in case of entrance doors for tall buildings, the spring that resists the opening of the door inward (as by gusts of wind)-will preferably have the greater tension or pull,-that is, will be much stiffer than the other spring; and the function of the stops is to prevent the stiHer spring forcing the door outward beyond the normal closed position.

When a person undertakes to push against the door to open it, at the outset lie has to l overcome the greater leverage and maximum resistance offered by the properI spring; but

as the door is swung wider and wider open, the leverage of the spring diminishes. In

like manner, as the door closes and for the present disregarding the checking-devices) the leverage of the spring increases, so that its maximum efficiency becomes available in holding the door closed. To adjust. the tension of either spring, the screws 27 (that lock its plate 25) are lo.. noch and a spanner wrench 31 (Figs. 4 and 10) is applied f' The preferable construction-'and' arrange-- ment of the checking-devices may Abe seenni and holding shaft 22jand the. fixed spring- 'anchorBQl stationary, I

Figs/5 andG, as consisting of two parallel an'd horizontallydisposed cylinders 34 and' with pistons 36 and 37, located ,near the ol'ieratiug-shaft 3, and between' said shaft and the springs-11 andlQ. TheI cylinders' vvalve 45 or through the hy-pass 40 (which Aduring this operation is closedbv `the'ps" l reopen at -their forwardend 'adjacent the shaft- 3, and'closedat the otherv or .rear.eiid-. `A'eonnecting- )it'man 38, 39,15 .plvoted to` 'each piston an to the shaft 3, sons to afford vthe preferable positive connection between thedoor vand the checlingfdevice.

Y vthedoor'l is initsnorlnalfclosed position,

thetwo pistons lie-side-hy side, midway of theasylindergand the pivot-connection of` eachizpiston to shaft 3Iis 'at one side ofthe dead .center f'and the arts are so arranged that when-one piston vmoves inward .the other moves outward; andvice versa.

. Located in' the wall of cylinder 34 is a longithefwallof the other'cylinden is as iinila-r. 'by-pass 41. Transversely through thegwall 'off cylinder 34,- inrthe .rear portion thereof, ex-

- tudina-l by-pass 40, Whosel forward end lopens justinjront of said normal-median position Y ofv piston 3,6, whilel the -rear'e'nd of `the/bj'.Y` lpassfo ens into the cylinderatsthe extreine'- the latter and similarly .located .in

tends a smallv .port or. vent A'i21(Fig..'2),Lpreferahly, located in thevupper'portion ofsaid l Y. .xx-(all, and a. si'nilar vent 44 is' si-Inilarlyjlocated in rtheothercylinder 35 and the restricted -passagethrough-'these comparatively-minute `vents is regulated by the adj acenft'imanually- .'adjusted screw-plugsf-t, in cove1"7,'whose v valve 4 5 held against escapo' by a transversal 4pin 46 (Fi-g.- 7),;thus affording anl autotips can enter vents 42 .and more' or less'v (Fig, 3)@ 4Through each :piston-head. ex-

tends V: ivalve-port, in which is'seateda ballln'afie Avalve. that permits free passage from the front to therear of the piston v(from left.v to right) whileautomatically prevent-v ingr passage therethrough in the `opposite'direetion. ".'lheeutire casing 5 is filledwith the usuallleavy) oil employedv in liquid passes-and ports when peri'ntted. l

Fig.. 5 is the normal position ofjrest, the

, server (ourtoward'the top ofthe-sheet 1nA eheokirig-devices, whichenters the cylinders.

and will pass freelythrough the vvarious by- -door .being` closed. When'the doorj 'lI is opened, as in a ldirection away from the oh- Fig. (i), the adjacentpiston 36 moves for- -ward fromits normal* median posit-ion and approaches shaft', the oil lflowingl freely' 6.5'

past its hall-valve so that'this piston 36 is its linofvements, in either, direction .in .elosing andr checking the door,

not vnow retarding or checking thjswing of the door in opening, although its bypassft becomes shut lotpbyV the piston, while` the` other piston 37v'moves rearward, away',from

shaft the oilpassingvv freely arpund it through its hy-pass 41 so that this other the `swing of the door. lVhen the door 1 is released and spring .11 is closing it, thevlastnamed piston 37 returns toits normal-ine'- dian position, oil dow-ing freely'past itslballvalve`45 and. through vits by-pass. 41'; while the vpiston 36 checks and retardsI the l'elt's'in imovement, since no oil can flow past it's'ba l ton),-tl1 e vonly escape for the oil beneath `pistoifl being through# the restricted vent piston 37 also is not at this stage'eheeking vso 42. l And thefdo'om because .of its'f*posi-tiveA connection -to the vpiston', cannot closefind ,Iva-nce ofthe slowly-travel ing piston. In'like manner,v should the door bei 'opened in fagdirectiontown rd lthe observer -(`as 'toward tle bottom of the sheet in Figs. and 6l) t'he then-adj acentv piston 37 moves 4orvfvardf from its median position (Fig, 5) while-'thefother Y, piston'moves rearward, neither pistonh lcheekingethe swing of the door; and wh'en'the door swingsback, vt-he adjacent piston 37 retards and checks the movement while' the-'other piston 36 `is .not'checking Ihehperative checking-travel of .eachpiston isf'fr m Athe other set coperates to theexten't ofbe-ing loo rendered idle,-that is to say,"of notA interfering with the v{irst--nalued set; an'dfvice.

versa. Moreover, as already explained each one of the two spring-devices and each one of the two checking-devices can lie independently regulated lfor varying-eondi'tions,

The location o the connectionffoffeach Apitxnan upon shaft Bis such as to decrease Ythe leverage exerted upon thepiston'hy the door as it approaches its normal closed''posi nominare, thejinisal oppositionf the words, in` closing or. pull of the'sprin Y creases, the effective.

'opposition 'of the cheek likewise increases..`

12's relatedtotheincreasing tension. or =pul l` of' its' coperatlngespring 11 or' 12.%-Inf.'o`ther .Y thedoor, as the tension 'i GII ous devices, modifications may be resorted..

to, an partsinay be' usedto the exclusion of other parts, without departing from the spirit of my invention, which isset forth in the annexed-claims.

1. In a door-closer and check,4 vthe coinbinationwith closing-mechanism carried inde pendently ofthe door and inclndinga shaft adapted to be secured rigidly to' the doorto 254 consti tiitel.one hinge-pintle A therefor so as to be turned upon movement of thedoor between .the open and closed positions and spring-mechanism upon 'one side of the shaft..

opposing the movement of Vsaid shaft `when the dooris beingopened, of-c-heckin'g-mech- `aiiisiii carried 'ndbepeiidently of the door and beingrv disft from the spring-mechanism, which checkingmiechanism is so located that its line-of action passes 4to one VA'depend'ently of'fthe door, including-a shaft 40' adapted-to-be turned upon movement ot the 'door between itsopenA Yund-'closed positions, and spring-mechanism iiponpone side of the Y inittin is in a closed position.

2. In a door-closer and check, thevcoinbinationwit-h closing-mechanism carried infor Aoperative' connection withthe door and shaft and having positive connectionj with said shaftan'dv opposing the movement there of when .the door is l`ieing'-opeiietl,.of checking-mechanism distinct. from said-.springiiiechanisrn-and compris'unelr a .cylinder and a piston, andpositive connectlonibtween said piston'and said shaft, Y

` 3. In adoor-clos'er and`- check, thecombination with closing-mechanism carried independently of the door, includingl 'a shaft' for operati-ve connection with the door andv adapted to be tur-ned upon movement of the door between its open and closed positions,

and spriiigrmechanisin upon one side ofsaid shaft and having positive connection'to said 'shaftl and opposing the movement. thereof when the door is being opened, of liquid checking mechanismdistinct from said spring-mechanism and''comprising` a' piston and a cylinder aiid'i'alving-means for per- 'g liquid to pass from one side of said piston to the other.

-with a valve for side voftheaxis of the-shaft when tl'ie door' nec-ted to said shaft 4. The` herein described sclfcontained door-closer and check, comprising the combination with a closed casing, of a shaft journaled therein and adapted to be tu'rned upon movement of the door between' its open and closed positions, spring-mechanism inclosed inthe same compartment of said casing upon shaft.- and opposing the movement thereof when the door is beine? opened, liquid checking-mechanism located@ lwithin the same Casin,"Y and distinct from said one side of said spring-mechanism, said checkingmiechanism ,comprising a cylinder and piston and positive connection between said shaft and said piston.

Y 5. The herein described self; contained door-closer and check, comprising' the coinbination with :i closed casing, ofa shaft jonrnaled therein and adapted to be'tnrne'd upon movement of the door between its open and closed positions, spring-mechanism in- Closed in said casing npon one side of said shaft and opposing the movement thereofA when thedoor is bein@r opened, liqnid check'- iiig-inechanisin located within the saine compart-ment of said casingr 'and distinctv from said spring-mechanisni, said checking-incohanism comprising a cylinder and a piston permitting' liquid to pass from one side of the piston-t0 the other. and positive connection between said shaft and said piston.

6. A door-closer and check for doubleacting doors, comprising the combination of a shaft for operative connection with the door and adapted to'be rotated hy. tliefswinf;

tions, spriiig-mechanism actin;r upon said either direction and serving to close HierdoorV when released, a checking-device to oppose the closing-movement of the door from one direction, and a second checking-device to oppose the reverse .closing-inovenient the door, said check-ingdevice being so arranged- -and connected that the line ofactio'n of each ,-of the door between its open and closed posi- 'shaftto oppose tlie'opening of the doorin; A .1.0.5

is located to one side ofthedcad center of said shaft when the door is in closed position.

shaft for operative coniiection-,with theA door and adapted to berotated hy"t.lieswin,gf of the. door between its open'and closed posi tions, spring-mechanism actingr upon said .shaft to oppose the .opening of the door in either direction and serving to close the door when released, checking-device compris: ing.;r a p istoii'pivotzilly connected to said shaft andopposing the closing .movement of the door from one direction, and asecoiutchecking-device comprising a. piston pivotally conand opposing the icversc closing-movement` of said door,isaid checking-devia@ being so arranged and con'- nected that the line of action of each .is lotion between said piston and said shaft that is independent of 'the' connection .for said `spring-mechanism, said connection for the checklng-mechanimbeing located at one side of the dead center when the door is closed.

9. In a door-closer and check, the combination of a shaft adapted for operative 'con- 2o nection with the door so as to be oscillated by the swinging of the door, mechanism to oppose the opening of the door, and liquid `checking-mechanism to retard the closing of the door, said checkin -mechanisni compris=- ing a piston and cylln er, and having apas-v sage with an automatic valve that prevents the How of li uid therethrough while the piston is retar ing the closing-movement of' the door, having also a second passage that is closed by said piston during all thcperiod while thus retarding, and having means to permit restricted lflow of liquid therethrough.

10. In a door-closerl and check for doubleacting doors, the combination of a shaft '35 adapted to beoperativcly" connected to the door so as to be oscillated upon swin of/the door in either direction, spring-mec anis'm' connected tovsaid shaft for closing said door from either direction, a liquid checking-de 40 v ice comprising a cylinder and a piston connected positively to said shaft and that opposes the closing of said door from one-dif rection, a similar ositivelyl connected checking-,device o vposing such movement from the opposite irect-ion, andl means comprising an automatic valve Vand a by-pass whereby liquid' is ermitted to How freely 1 through both of said checking-'devices when the door is being opened but when the door, is closing is permitted tov fi6w freely .through only one of said devices and is ref tarded from fiowing through the@ other.

11. In a door-closer and check lfor vdoublea cting doors, the combination )f a shaft y adapted to be operatively connected to the door so as4 to be oseillated upon swing of the l; door in either direction, mechanism for closf ing said door, two liquid .checking-devices f comprising each a cylinder and piston-that (5.0 opposes the closing movement of said door each in its own direction, each checking-de vice containing a by-pass adapted to be sealed by its piston during all theriod while the latter is-retarding the door-c osing movement, and containing also a valve that closes automatically against the passage of liquid While the piston is thus retardi-ng.

12. In a door-closer and check', the combination with closing-mechanism carried independently of the door and including a shaft adapted for rigid connection to the door and which is adaptedto 'be turned with the door upon movement of the door be#l tween the open and closed positions, and spring-mechanism opposing the movement of said shaft when the door is being opened,

of liquid checking-mechanism.carriedv inde-H pendently of the door and being distinct from the spring-mechanism, said checking# mechanism comprising a pistonpivotally secured tosaidshaftandhaving its 'line of action lying to one side of the dead-centerl when the door is closed.

. 13. Ina door closer and check for doubleacting doors, the combination of a shaft adapted to be secured rigidly .to a doorto constitute one hingeintle -tberefor ,a spring operatively connecte to saidl shaftand serving to close the door from its open position at one side of the doorway, a' second fspring 'similarly connected to close the door `from its open position at the other side of the doorway, liquid checking-mechanism including a piston connected to said shaft and opposingr the closing of the door-from either' direction, and means including an automatic check-valve connected with said checkingmechanism to prevent said checkingmecha nism from opposing thel opening ofthe door in either direction.

14. A door-closing and checking device for double-acting doors, comprising the combination of a sha-it adapted to be secured rigidly to the doorto constitute one hingepintle therefor, spring-mechanism operatively connected to said shaft to=oppose the ,openingv of the door in either direction,

checking-mechanism comprising Ia .piston pivotally connected to said shaft. to oppose the closing of thedoor'fromE one direction,

separate checking-mechanism comprising. a

piston pivotally ,connected to =oppose r the closn from the other fdirectionf and Zmeans inclu ingan automatic check-vaivetovprevent said checking-mechanismsfrom oppas-- ing the opening of'the-door. v

15. An interchangeable Adoor-closer :and i check, comprising the combination of acasing containing a vertical shaftY journaled therein Vand adapted tobeA .turnedTA by the swing of the door and to control lthe latter, spring-mechanism located within. said -casin the operative relationv thereof to:said sha being such that said springris-attaining its maximum efficiency as the door is; approaching its closed position, and liquidtchcckingmechanism also located in 'said casingand having a piston pivotally; corlected--ltoQ-said shaft to oppose the closinglof thejdoor' and said checklnglmechanism being so arranged its closed Vposition. I `16.*A, door-closing and Acheckingfdevice for '-double-acting doors,

" and connected :is foibe attaining its maxi-- mum opposition as the door approzximhtes comprising the coiiibiiiat-ioii of ii shaft adapted to 'beoper'atively connected to the 'positively mid-'operatively connected to seid shaft to' oppose the opening of -the door door, -mechainisin in one direction and tending to. close it from that direction, independent "inecha msm "positively` -:nid operatively-.connected to saidA shaft and tendii'ig to 'oppose the 'opening of the. door inA its'opp'os'it'e' di- 'rectiori and tending to close it from that last-named. direction, checking-mechanism con'iprisi'n'g n piston pivotally connect-'ed to said shafttooppose the closing of the door jin Ieither direction, and 'means including an automaticl 'checklvalve connected-A with said- 'checltiiig-iieclmiiisin` to prevent the -letter for'doubleexciting, doors, comprisint-he coin. '.-25

fromopposingl the openingof. thedoor. c

A door-closing und checkingfdevice b iii'z'iti'on of a shaft adopted' to e 'Operetively connected tothe 'door, spring-mechanism' coinected to said shaftA to oppose the opening ofthe" door in one direction and ing to 0 A mechanisnii comprising it 'piston pivotally' 40 the door from means comprising shaft :1nd tending lto 'oppose Athe opening of the'door in its opposite direction 4ii-iidtending to v close it from 'the last-namedfdirection, i'exihle conncti'onsfbetwen shaftA and each of .said mechanisms whereby" each oor mechanism will oper-:ite only when t l ie is opened or closed in; the direction pertiunthat meehanism, liqnid"checking connected "tosaid shaft to opposethe closing ofthe door in eithe'i-direction, sind means ed with sitidlcheckirig-mechanism toprevent v the latter from opposing the vopening-o the door.' A 18; The combination with it do'iible-cti'ng door, of checkiiig-'meehnnismtherefor coinone opposing one direction other opposingthe closing of the other .direction only,` and Vliquidi-passages sind valvin devices `therefor for preventingboth of devicesA frontopposing the opening of the door from either direction. Y

only, -nnd the" 19; -The ,coinbiiizitionwith fa double-acting do'oi, of 'n shaft. connected operatively t-o the door, checkingfinechanism comprising tion. i

20. A liquid checking-mechanism' fork ,pistons vfor respectively opposingthe closing' said shaft'enlilyng tdoneside o'f the dead -he Adoor is in the closed-posicenter when ingA each of said four devices. 22. In a. door-closer and-'check'fordoubleto close Iit-froin that direction, independent spring-mechanism connected'to said passes for said che -when the door 1s closed.

"doubleacting doors, comprising-a cylinder and pist-on adaptedfor operati-ve-relation to 'checking the elosing-movemeiit'of the 'd ooi. l 21. In :i door-c1oser and Vcheck for doubleect-iiig doors, the combination' ofjf a doorclosingdevice and a door-checking device oo- 'gind ineansf vfor'lper-niitting 'acting when the door is openingand closing'A v upon one side of its doorway, e second door closing device and a seco'iiddoor-checking. deviceco-nctin'g when the door-is opening and closing on the other side o f'thefdOor-- way, and means for independently-'edjust acting doors, the combination of adoor-'c`los 'ing device and a door-checking de'i'fice colacting when the door is opening andfclosing upon one side of its doorway-,joJ second doorclosing device and :t second door-checking device'co-acting when the door i'sopening 51nd closing on the other'side ofthe doorway, andineans including flexible connections for said closing-devieesund liquid by ,hing-devices gw'hereby when either pair of closing and checking de. vices is acting upon the door-the othrfpair rendered non-interfering. therewith.

23, In n door-closer andic'helck fordoubleacting doors, the combination ofl a door-4 closing device and a door-checking device co'- iicting when the door is o'penin'gand closing l upon one side of its doorway, a second d0orclosing device zuid a secondvdoorfchecking device eo-acting when the door is and closingl on theothe'r sideof' Way,

:opening:- he. door- -and lever-coiineetions. wherebyeach door-closing device increases its pull'as the?,

door is closing and exerts its maximum; pnll 2'4. -In a door-closer and check for double-v acting doors, the combination of a door-clos` ing device and a, door-eheeling device ooacting when the door is opening and closing upon one side ofits doorway, aseoond dooi'f closing device and the 'second door-checking device eo-acting wlien`t-he door A`is' op ening and closing on the other sidefo-the dooi'- .we v, and lever-connectionsA whereby each vc heckimg-levice vexerts .its minimum 'oppo' .sition when the door. begins to 01o gradually 'increasesto its maximum bp sition itt the moment of,

2-5; A liquid oclosing-the door?- checking i mechanism for double-acting doors, `comprising e cylinderV to the rdoor, a by-pass, vulve-means actuated bythe Swing of the door for sealing said by-pass during all theperiod while the pis 4 permitting liquid to pass freely from Onetonv is Serving to check the door-closing, and an automatic valve -for preventing flow of liquid past the 'piston when the latter is serving to check said closing-movement.

26. The eom-binzitioinwith double-acting door, of a shaft connected operatively to the door, checkingmiechanism comprising a. cylinder and piston', the piston occupying-a neutml position in Suid cylinder when the door is in zi closed position,'operative connect-ion betweenseid sha-tt and seid piston whereby the piston' is movable in either direction from its nenti-:ilv position in seid cylinder.

27. A liquid checking mechanism for doublencting doors, comprising a, cylinder and piston adapted foi' operative rela-tion' to thc door, if'nlvc-i'nenns for permitting liquid to pix-ss freely fromone side of the piston to the other side of the piston when' the door opens in one direction, and valverneans for permitting liquid to pass freely from the last-named side of the piston to the first-named side of the piston when the door opens in the other direction.

9S. A liquid checking mechanism for double-acting doors, comprising two cylinders each having n piston adapted for oper- :itive relation to the door, vulve-means for,

side of euch piston to the other Side thereof when the dooropens in one direction, valvemeans for permitting liquid to pass freely from the last-named side of each piston to flow of`1iquid on thel door, of a shaft connected operatively to said ,Y

door, checking-mechanism comprising e eyliiider and a piston, operative relation beby the swing of the door in either direction tween said shaft and said piston whereby said piston is movable from the osition it i occupies when the door is in its c osed position. Y

l 30. In :i door-closer and cheek mounted independently of the door, the combination of a shaft adapted to be operatively oo nnectf ed to the door so asv to be'oseillatedby the swinging of thedoor,spring-mechanism, a

connection between the seme and sidg'sheft whereby the spring opposes theopening of the door, and checking-mechanism opposing the closing of the door, said checking-mechanism comprising a cylinder' and n piston mounted independently of said spring,` and seid piston having operative connection with said shaft that is independent of .the

connection for said spring-mechanism, seid connection for the cheeking-mechanisni being located to one side of the deadeenter when the door is closed;v

ln witness whereof,. I hereunto subscribe my name this second day of February A. D.,

A 'OSCAR C. RIXSON. Witnesses:

J. liAws Geenen PiiiNGLE.

y permitting' liquid to pass freely from one 1909.

side of each piston t0 the other side thereof OSCAR C. RIXSON. when the door opens in one direction7 valve- Witnesses:

means for permitting liquid to pass freely J. R. Laws,I from the last-named side of each piston to GEORGE PRINGLE.

BISGIJAIMER- romance` r, tenis serving to check the door-closing, and

an automatic valve for preventing flow of liquid past the piston when the latter is serving to check said closing-movement.

26. The combination, 'with a double-acting door, of a shaft connected operatively to the door, checking-mechanism comprising a cylinder and piston, the piston occupying-a neutral position in said cylinder when the door is in a closedY positioin'operative connection betweensaid shaft and said pistonwhereby the piston is movable in either direction from its neutral position in said cylinder.

27. A liquid checking mechanism for double-acting doors, comprising a cylinder" piston to the other side of the piston when' the door opens in one direction, and valvemeans for permitting liquid to pass freely from the last-named side of the piston to the first-nan'led side of the piston when the door opens in. the other direction.

Q8. A liquid checking` mechanism for double-acting doors, comprising two cylinders each having a piston. adapted for operative relation to the door, valve-means for,

Enters this disclaimeras follows:

is in its closed positiorii.

'[OrIoIAL GAZETTE, July Q3, 1.91%]

and piston adapted for operative relation' 1,025,309.-0sca1' 0. Risom New York, Y. Doon-CLOSING MEOHANISM.

i dated May 7, i912. Disclaimer filed July 6, 1912, by the patenteei the first-named side thereof when the door opens in the other direction, and valveineans for restricting fiow of liquid on thev closing ofthe door from each direction.

29. The combination, with a double-acting door, of a shaft connected operatively to said i door, checking-mechanism comprising a cylinder and a piston, operative relation between said shaft and said piston whereby by the swing of the door in either direction i said piston is movable from the position it occupies when the door is in its closed position.

30. In a door-closer and check mounted independently of the door, the combination to'r of a shaft adapted to be operatively connected to the door so as to be oscillated by the swinging of theydoor,spring-mechanism, a connection between the same and said-shaft whereby the spring opposes the opening of the door, and checking-mechanism opposing the closing of the door, said checking-mechanism comprising a cylinder' and a piston mounted independently of said spring, and

said piston having operative connection.

with said shaft that is independent of the connection for said spring-mechanism, said connection for the checking-mechanism being located to one side of the deadcenter when the door is closed.`

In witness whereof, I hereunto subscribe my name this second day of February A. D.,

Patent To that 'part ofl said Letters Patent which constitutes claim 29 thereof, reading 29.` The combination, with adouble-acting door, of a shaft connected. operativelyy to said door, checking-mechanism comprising a cylinder and a pistonpoperative relation between said shaft and said piston whereby by the swing of the door in ,either direction said piston is Imovable from the position it occupies when the door Disciaimer in Leners Parent No. 1,025,309,

IDlSGLAIMER- 1,4)25,309.-Oscar C'. Imwm, New York, Y. Doon-CLOSING MEGHANISM. Patent dated Muy 7, i912. Disclaimer filo/d July 6, 15412, by the patenteei Enters this disclaimm f- To that paut of said Lotions lutont which constitutes clanfi 29 thereof, reading :is follows:

29. The combination`r with a douhlc-zwting door, of a shaft connected operatively to said door, checking-mechanism comprising a cyiindei' and a piston, operative reiation between lsind shaft und .said piston whoi-ohy by the swing 0f the door in either direction said piston is movnhe from the posicion it occupies when the door is in its close-d position.r

[OFFICIAL GAZETTE, July 2.3, 1912@ 

